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Journal Article

Responding to inequities: Gorillas try to maintain their competitive advantage during play fights

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Citation

Van Leeuwen, E. J. C., Zimmerman, E., & Davila Ross, M. (2011). Responding to inequities: Gorillas try to maintain their competitive advantage during play fights. Biology Letters, 7(1), 39-42. doi:10.1098/rsbl.2010.0482.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0012-2CA8-6
Abstract
Humans respond to unfair situations in various ways. Experimental research has revealed that non-human species also respond to unequal situ- ations in the form of inequity aversions when they have the disadvantage. The current study focused on play fights in gorillas to explore for the first time, to our knowledge, if/how non-human species respond to inequities in natural social settings. Hitting causes a naturally occurring inequity among individuals and here it was specifically assessed how the hitters and their partners engaged in play chases that followed the hitting. The results of this work showed that the hitters significantly more often moved first to run away immediately after the encounter than their partners. These findings provide evidence that non-human species respond to inequities by trying to maintain their competitive advantages. We conclude that non-human pri- mates, like humans, may show different responses to inequities and that they may modify them depending on if they have the advantage or the disadvantage.